Cyril lyons



March l0, 1925. I,529,61

- C. LYONS MOUNTING OF SWINGING DOORS, COVERS, WINDOWS, AND THE LIKE Filed April gli 1924 @y1 Patented Mar. 10, 1925.

UNITED STATES PATENT OFFICE.

MOUNTING 0F SWINGING DOORS, COVERS, WINDOWS, AND THE-'LIKE Application filed April 21, 1924.

To all whom t may cou-cern.'

Bc it known that I, CrmL LYoNs, a` subject of His Majesty the King of Great Britain, residing in London, England, have invented certain new and useful Improvements in thel Mounting of Swinging Doors, Covers, IVindcws, and the like, of which the 'following is a specification.`

This invention relates to an improved mounting for swinging doors, covers, windows and the like. More particularly it relates to doors or covers such as are used on the fronts of show-cases, book-cases and the like, for example, of the kind wherein the door is opened outwardly and at the same time is swung back into the case, so that in the fully opened position the door is wholly or partially within the case and parallel to the side of the case.

A mounting for a door of a cabinet or show-case has been proposed wherein the door is mounted on two pairs of separate double tracks, one pair of tracks being secured to the cabinet adjacent to the bottom edge of the door and the other pair adjacent to the top edge of the door. The top or bottom edges of the door are each fitted with a pair of castors or the like whiclrengage the respective pairs of tracks. One track of. each pair is adapted to guide one vertical edge of the door by means of one of each pair of castors in a path approximately at right angles to the position of the'door when closed, the other tracks being curved to guide the other castors of each pair, so that the door turns through approximately a right angle whilst opening or closing.

In such an arrangement it has been proposed to form the forward end of the guide track on which the inner end of the door is mounted, with an arc struck from the axis of the mounting of the door on the other track constituting the pair of tracks when the door is in the closed position for the purpose of imparting an initial pivotal opening motion to the door before the beginning of the sliding motion, which removes the door into the show-case or cabinet and also to form the inner end of one track of each pair with an arc which eects a parallel location of the door to the side of the cabinet or the like when the door is completely open and pushed back to its full extent.

According to the present invention a Serial N'o. 708,018.

mounting which gives the door an initial pivotal opening motion before the sliding motion takes place, is provided cou'iprising a single continuous track for one side of the door (the top for example) and a similar track for the opposite side thereof (the bottom for example). Thus the usual pairs of double tracks above referred to are dispensed with.

In carrying out the invention. each track for the reception of the projections, castors or the like, on the sides of the door or the like comprises a horizontal portion parallel to the side of the case or the like terminating near the front of the case in a curved por-- tion adapted to swing the door substantiallyv through a right angle, and at the junction of the curved portion with the horizontal portion, a further curved or offset portion is provided, by means of which the initial pivotal opening movement of the door is oby tained.

lith this arrangement, in the closed posit-ion, the projections or the like nearest the centre of the door rest in the curved portions of the tracks which are adapted to swing the-door substantially through a right angle, while the other projections nearest the edge of the door rest in the other curved or offset portions of the tracks referred to above.

On pulling the door outwards, it [irst pivots about the projections nearest its centre. the other projections being positively guided into the horizontal portions of the tracks.

Continued movement of the door causes the projections nearest its centre to be positively guided by the forwardly curved por tions of the tracks into the horizontal portions of the tracks, so that the door is opened and at the same time its inner edge is carried into the case or the like. In the fully open position, the door is parallel to the side of the case and is partially pushed back into the case, according to the length of the horizontal portions of the tracks.

To enable the invention to be fully understood it will now be described by reference to the accompanying drawings in which Fig. l is a front elevation of a show-case having the invention applied thereto, the door being closed, and mounted so as to swing in a horizontal plane;

Fig. 2 is a sectional side elevation thereof.

As shewn, the case 3 is provided with a swinging door 4 having two pins 5, 6 on each side engaging slots or tracks formed in the interior of the case. The pins are carried on plates 7 secured to the door frame and the slots are formed in metal fittings 8 secured one on each side of the case, on the inside thereof.

Each slot comprises a horizontal portion 9 leading into a portion 10 curved as shewn and at the junction between the portions 9, 10 an offset portion 11 curved as shewn is provided.

As shewn in Fig. l with the door 4L in the closed position the upper pins 5 rest in the offset portions 11. the lower pins 6 being in the lower ends of the portions l0.

On raising the bottom edge of the door 4, the latter pivots about the pins 6, the pins 5 being positively guided into the horizontal slots 9.

Continued raising of the door causes the pins 6 to be positively guided by the curved slots 10 into the horizontal portions 9 so that the door is raised and at the same time its upper edge is carried into the case as indicated in dotted lines A in Fig. 2. In the fully open position the door is horizontal and parallel to the top side of the case and is pushed back into the case for a distance depending on the lengths ot the horizontal slots 9.

The offset slots 11 are designed to allow a true pivoting action on the pins 6 when the door is first raised and at the same time to guide the pins 5 into the slots 9 positively and easily without Jamming. The slots l() are curved to guide the pins 6 into the slots 9, smoothly, with the least possible friction and to avoid all possibility of jamming.

The pins 5, 6 may be fixed directly to the door frame and provided with rollers or other antifriction devices. The slots may be formed directly' in the material of the case or by rebates or in plates of any suitable substance attached to the inside of the case.

The sides of the door may have rollers attached thereto adapted to roll on tracks formed on the plates carrying the horizontal slots or on horizontal tracks attached to the sides of the case ifdesired.

It will be understood that the invention is applicable to doors or the like whether mounted to swing in a. horizontal plane or in a vertical plane and to various articles fitted with swinging doors or covers.

Having thus described the nature of my said invention and the best means I know of carrying the same into practical effect, I claim 1. A disappearing door construction for show cases comprising a door, walls provided with straight horizontally disposed grooves, each groove having a portion at the front end thereof curved towards the interior of the case and also an offset curved portion at the junction of the horizontal portions, with the front curved portions of the grooves and forming a sharp angle with Vsaid inwardly curved portion, pairs of pins for engaging said grooves secured one pair on each side of' the door, the arrangement being such that when the door is closed one pin of each pair rests in the offset portion of the groove and the other pin in the curved front portion of the groove.

2. A disappearing door construction for show cases comprising a door, walls pro vided with horizontally disposed grooves, each groove having a portion at the front end thereof curved towards the interior of the case and also an offset portion at the junction of the horizontal portions with the front curved portions of the grooves, said offset portion being arcuate in form having a center at the end of said inwardly curved portion, pairs of pins for engaging said grooves secured one pair on each side of the door, the arrangement being such that during the opening and closing movements of the door the pairs of pins are always in close contact with the grooves and are positively guided thereby.

In testimony whereof I Vhave signed my name to this speclfication.

CYRIL LYONS. 

